RZW02.1-004-040 Bosch Rexroth Indramat
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MPN: R911200541
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The Bosch Rexroth Indramat RZW02.1-004-040 is part of the RZW Braking Resistors series and has a resistor value of 47 Ohms with a peak power rating of 3.5 kW. Its enclosure has IP20 protection class, and the unit weighs 5.2 kilograms with dimensions of 586 mm width, 120 mm height, and 185 mm depth. The unit features a line cross-section of 2.5 mm² and an operating factor of 40% SD.
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Product Description:
The RZW02.1-004-040 braking resistor is manufactured by Bosch Rexroth Indramat within the RZW Braking Resistors series. As a dissipative load, it converts excess kinetic energy from connected servo axes into heat, preventing overvoltage on the shared DC bus during rapid braking events. The mechanical design is identified as variant 1 and occupies a space 586 mm wide, 120 mm high, and 185 mm deep. The mounting depth is limited to 150 mm, allowing the unit to fit in standard control cabinets. Power cables are fastened to M6 threaded terminals on the housing.
The resistor element has a resistance of 47 Ω and can be connected in parallel only with external modules that keep the total resistance above the minimum connectable value of 30 Ω. During dynamic stops, the device withstands a peak pulse of 3.5 kW. Thermal averaging is governed by a 40% duty cycle based on a 120-second load cycle. Within that period, the resistor may conduct for 48 s, followed by a mandatory recovery interval of 72 s. The aluminum enclosure bolts to backplane rails through mounting points spaced 526 mm apart. It accepts 2.5 mm² conductors on line designation 2 and connects to control hardware that monitors the duty cycle so the operating limits are not exceeded.
Long-term temperature rise is characterized by a 300 s thermal time constant, meaning the internal mass reaches 63% of its final temperature rise five minutes after a step change in dissipation. The continuous service capability is 4 kW, provided cabinet airflow can remove the heat conducted through the finned body. The assembly meets IP20 protection, so live parts are guarded against finger contact, but the unit must be mounted inside a ventilated enclosure. With a mass of 5.2 kg, the resistor imposes a moderate static load on its mounting rails. Its shallow profile helps maintain clearance behind panel doors in crowded drive cabinets.
